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<h2>/GLSLShowpiece Lite/Models/Teapot/Teapot.c</h2>
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<pre class="sourcecodebox">//-------------------------------------------------------------------------
//
// (c) Copyright 1994, Mark J. Kilgard.
// Modifications by Philip Rideout.
//
// (c) Copyright 1993, Silicon Graphics, Inc.
//
// ALL RIGHTS RESERVED
//
// Permission to use, copy, modify, and distribute this software
// for any purpose and without fee is hereby granted, provided
// that the above copyright notice appear in all copies and that
// both the copyright notice and this permission notice appear in
// supporting documentation, and that the name of Silicon
// Graphics, Inc. not be used in advertising or publicity
// pertaining to distribution of the software without specific,
// written prior permission.
//
// THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
// "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
// OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
// EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE
// ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
// CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
// INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
// SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
// NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY
// OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
// PERFORMANCE OF THIS SOFTWARE.
//
// US Government Users Restricted Rights
//
// Use, duplication, or disclosure by the Government is subject to
// restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
// (c)(1)(ii) of the Rights in Technical UniformData and Computer
// Software clause at DFARS 252.227-7013 and/or in similar or
// successor clauses in the FAR or the DOD or NASA FAR
// Supplement. Unpublished-- rights reserved under the copyright
// laws of the United States. Contractor/manufacturer is Silicon
// Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA
// 94039-7311.
//
// OpenGL(TM) is a trademark of Silicon Graphics, Inc.
//
//-------------------------------------------------------------------------
//
// Rim, body, lid, and bottom data must be reflected in x and y;
// handle and spout data across the y axis only.
//
//-------------------------------------------------------------------------
#import <OpenGL/gl.h>
#import "Teapot.h"
#define NumTeapotPoints 135
int patchdata[NumTeapotPoints][16] =
{
// rim
{102, 103, 104, 105, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
// body
{12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27},
{24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40},
// lid
{127, 128, 129, 130, 97, 98, 99, 100, 101, 101, 101, 101, 0, 1, 2, 3},
{0, 1, 2, 3, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117},
// bottom
{131, 132, 133, 134, 124, 122, 119, 121, 123, 126, 125, 120, 40, 39, 38, 37},
// handle
{41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56},
{53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 28, 65, 66, 67},
// spout
{68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83},
{80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95}
};
float cpdata[][3] =
{
{0.2f, 0, 2.7f},
{0.2f, -0.112f, 2.7f},
{0.112f, -0.2f, 2.7f},
{0, -0.2f, 2.7f},
{1.3375f, 0, 2.53125f},
{1.3375f, -0.749f, 2.53125f},
{0.749f, -1.3375f, 2.53125f},
{0, -1.3375f, 2.53125f},
{1.4375f, 0, 2.53125f},
{1.4375f, -0.805f, 2.53125f},
{0.805f, -1.4375f, 2.53125f},
{0, -1.4375f, 2.53125f},
{1.5f, 0, 2.4f},
{1.5f, -0.84f, 2.4f},
{0.84f, -1.5f, 2.4f},
{0, -1.5f, 2.4f},
{1.75f, 0, 1.875f},
{1.75f, -0.98f, 1.875f},
{0.98f, -1.75f, 1.875f},
{0, -1.75f, 1.875f},
{2, 0, 1.35f},
{2, -1.12f, 1.35f},
{1.12f, -2, 1.35f},
{0, -2, 1.35f},
{2, 0, 0.9f},
{2, -1.12f, 0.9f},
{1.12f, -2, 0.9f},
{0, -2, 0.9f},
{-2, 0, 0.9f},
{2, 0, 0.45f},
{2, -1.12f, 0.45f},
{1.12f, -2, 0.45f},
{0, -2, 0.45f},
{1.5f, 0, 0.225f},
{1.5f, -0.84f, 0.225f},
{0.84f, -1.5f, 0.225f},
{0, -1.5f, 0.225f},
{1.5f, 0, 0.15f},
{1.5f, -0.84f, 0.15f},
{0.84f, -1.5f, 0.15f},
{0, -1.5f, 0.15f},
{-1.6f, 0, 2.025f},
{-1.6f, -0.3f, 2.025f},
{-1.5f, -0.3f, 2.25f},
{-1.5f, 0, 2.25f},
{-2.3f, 0, 2.025f},
{-2.3f, -0.3f, 2.025f},
{-2.5f, -0.3f, 2.25f},
{-2.5f, 0, 2.25f},
{-2.7f, 0, 2.025f},
{-2.7f, -0.3f, 2.025f},
{-3, -0.3f, 2.25f},
{-3, 0, 2.25f},
{-2.7f, 0, 1.8f},
{-2.7f, -0.3f, 1.8f},
{-3, -0.3f, 1.8f},
{-3, 0, 1.8f},
{-2.7f, 0, 1.575f},
{-2.7f, -0.3f, 1.575f},
{-3, -0.3f, 1.35f},
{-3, 0, 1.35f},
{-2.5f, 0, 1.125f},
{-2.5f, -0.3f, 1.125f},
{-2.65f, -0.3f, 0.9375f},
{-2.65f, 0, 0.9375f},
{-2, -0.3f, 0.9f},
{-1.9f, -0.3f, 0.6f},
{-1.9f, 0, 0.6f},
{1.7f, 0, 1.425f},
{1.7f, -0.66f, 1.425f},
{1.7f, -0.66f, 0.6f},
{1.7f, 0, 0.6f},
{2.6f, 0, 1.425f},
{2.6f, -0.66f, 1.425f},
{3.1f, -0.66f, 0.825f},
{3.1f, 0, 0.825f},
{2.3f, 0, 2.1f},
{2.3f, -0.25f, 2.1f},
{2.4f, -0.25f, 2.025f},
{2.4f, 0, 2.025f},
{2.7f, 0, 2.4f},
{2.7f, -0.25f, 2.4f},
{3.3f, -0.25f, 2.4f},
{3.3f, 0, 2.4f},
{2.8f, 0, 2.475f},
{2.8f, -0.25f, 2.475f},
{3.525f, -0.25f, 2.49375f},
{3.525f, 0, 2.49375f},
{2.9f, 0, 2.475f},
{2.9f, -0.15f, 2.475f},
{3.45f, -0.15f, 2.5125f},
{3.45f, 0, 2.5125f},
{2.8f, 0, 2.4f},
{2.8f, -0.15f, 2.4f},
{3.2f, -0.15f, 2.4f},
{3.2f, 0, 2.4f},
{0, 0, 3.15f}, // north pole
{0.8f, 0, 3.15f},
{0.8f, -0.45f, 3.15f},
{0.45f, -0.8f, 3.15f},
{0, -0.8f, 3.15f},
{0, 0, 2.85f},
{1.4f, 0, 2.4f},
{1.4f, -0.784f, 2.4f},
{0.784f, -1.4f, 2.4f},
{0, -1.4f, 2.4f},
{0.4f, 0, 2.55f},
{0.4f, -0.224f, 2.55f},
{0.224f, -0.4f, 2.55f},
{0, -0.4f, 2.55f},
{1.3f, 0, 2.55f},
{1.3f, -0.728f, 2.55f},
{0.728f, -1.3f, 2.55f},
{0, -1.3f, 2.55f},
// bottom edge of lid
{1.4f, 0, 2.4f},
{1.4f, -0.728f, 2.4f},
{0.728f, -1.4f, 2.4f},
{0, -1.4f, 2.4f},
// bottom
{0, 0, 0},
{1.425f, -0.798f, 0},
{1.5f, 0, 0.075f},
{1.425f, 0, 0},
{0.798f, -1.425f, 0},
{0, -1.5f, 0.075f},
{0, -1.425f, 0},
{1.5f, -0.84f, 0.075f},
{0.84f, -1.5f, 0.075f},
// Top cap
{.03f, 0, 3.15f},
{.02f, -.01f, 3.15f},
{.01f, -.02f, 3.15f},
{0, -.03f, 3.15f},
// Bottom cap
{0, -.03f, 0},
{.01f, -.02f, 0},
{.02f, -.01f, 0},
{.03f, 0, 0},
// Spout closure
{2.8f, 0, 2.4f},
{2.8f, 0.15f, 2.4f},
{3.2f, 0.15f, 2.4f},
{3.2f, 0, 2.4f},
{3.2f, 0, 2.4f},
{3.2f, -0.15f, 2.4f},
{2.8f, -0.15f, 2.4f},
{2.8f, 0, 2.4f},
};
static float tex[2][2][2] =
{
{ {0, 0}, {1, 0}},
{ {0, 1}, {1, 1}},
};
// Returns the number of vertices sent to GL.
int DrawTeapot(GLint grid, GLdouble scale, GLenum type)
{
GLfloat p[4][4][3];
GLfloat q[4][4][3];
GLfloat r[4][4][3];
GLfloat s[4][4][3];
int i;
int j;
int k;
int l;
int numVertices = 0;
// Make polygons wind CCW by scaling by -1.
scale *= -1;
glPushAttrib(GL_ENABLE_BIT | GL_EVAL_BIT);
glEnable(GL_AUTO_NORMAL);
glEnable(GL_NORMALIZE);
glEnable(GL_MAP2_VERTEX_3);
glEnable(GL_MAP2_TEXTURE_COORD_2);
glPushMatrix();
glRotatef(90.0, 1.0, 0.0, 0.0);
glScalef(0.5 * scale, 0.5 * scale, 0.5 * scale);
glTranslatef(0.0, 0.0, -1.5);
for (i = 0; i < 10; i++)
{
for (j = 0; j < 4; j++)
{
for (k = 0; k < 4; k++)
{
for (l = 0; l < 3; l++)
{
p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
if (l == 1)
{
q[j][k][l] *= -1.0;
} // if
if (i < 6)
{
r[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
if (l == 0)
{
r[j][k][l] *= -1.0;
} // if
s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
if (l == 0)
{
s[j][k][l] *= -1.0;
} // if
if (l == 1)
{
s[j][k][l] *= -1.0;
} // if
} // if
} // for l
} // for k
} // for j
glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 1, 0, 4, 2, &tex[0][0][0]);
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0]);
glMapGrid2f(grid, 0.0, 1.0, grid, 0.0, 1.0);
glEvalMesh2(type, 0, grid, 0, grid);
numVertices += grid * grid;
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
numVertices += grid * grid;
if (i < 6)
{
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &r[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
numVertices += grid * grid;
glMap2f(GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &s[0][0][0]);
glEvalMesh2(type, 0, grid, 0, grid);
numVertices += grid * grid;
} // if
} // for i
// Draw the tiny quads at the top and bottom.
glBegin(GL_QUADS);
glTexCoord2f(.025f,.025f);
glNormal3f(0, 0, 1);
glVertex3f(0,.03f,cpdata[127][2]);
glVertex3f(.03f,0,cpdata[127][2]);
glVertex3f(0,-.03f,cpdata[127][2]);
glVertex3f(-.03f,0,cpdata[127][2]);
glNormal3f(0, 0, -1);
glVertex3f(-.03f,0,cpdata[131][2]);
glVertex3f(0,-.03f,cpdata[131][2]);
glVertex3f(.03f,0,cpdata[131][2]);
glVertex3f(0,.03f,cpdata[131][2]);
// Close off the spout.
glNormal3f(0, 0, 1);
for (i = 135; i < 143; ++i)
{
glVertex3fv(cpdata[i]);
} // for
glEnd();
glPopMatrix();
glPopAttrib();
return numVertices;
} // DrawTeapot
</pre>
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